package com.nowcoder.community.service;

import com.nowcoder.community.dao.LoginTicketMapper;
import com.nowcoder.community.dao.UserMapper;
import com.nowcoder.community.entity.LoginTicket;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.MailClient;
import com.nowcoder.community.util.RedisKeyUtil;
import io.lettuce.core.RedisURI;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.util.*;
import java.util.concurrent.TimeUnit;

/**
 * @author ：LY
 * @date ：Created in 2021/1/18 22:13
 * @modified By：
 */
@Service
public class UserSerice  {

    @Autowired
    private UserMapper userMapper;

//    @Autowired
//    private LoginTicketMapper loginTicketMapper;

    @Autowired
    private MailClient mailClient;

    @Autowired
    private TemplateEngine templateEngine;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private RedisTemplate redisTemplate;

    public User findUserById(int id) {
//        return userMapper.selectById(id);
        User user = getCCache(id);
        if (user == null){
            user = initCache(id);
        }
        return user;
    }

    public Map<String,Object> register(User user){
        Map<String,Object> map = new HashMap<>();
        if (user == null){
            throw new IllegalArgumentException("参数不能为空！");

        }
        if (StringUtils.isBlank(user.getUsername())){
            map.put("usernameMsg","账号不能为空！");
            return map;
        }
        if (StringUtils.isBlank(user.getPassword())){
            map.put("passwordMsg","密码不能为空！");
            return map;
        }
        if (StringUtils.isBlank(user.getEmail())){
            map.put("emailMsg","邮箱不能为空！");
            return map;
        }
        //验证账号
        User user1 = userMapper.selectByName(user.getUsername());
        if (user1 != null){
            map.put("usernameMsg","该账号已存在");
            return map;
        }
        //验证邮箱
        user1 = userMapper.selectByEmail(user.getEmail());
        if (user1!=null){
            map.put("emailMsg","该邮箱已被注册");
            return map;
        }
        //注册用户
        user.setSalt(CommunityUtil.generateUUID().substring(0,5));
        user.setPassword(CommunityUtil.md5(user.getPassword()+user.getSalt()));
        user.setType(0);
        user.setStatus(0);
        user.setActivationCode(CommunityUtil.generateUUID());
        user.setHeaderUrl(String.format("http://images.nowcoder.com/head/%dt.png",new Random().nextInt(1000)));
        user.setCreateTime(new Date());
        userMapper.insertUser(user);
        //发送激活邮件
        Context context = new Context();
        context.setVariable("email",user.getEmail());
        String url = domain + contextPath +"/activation/"+user.getId()+"/"+user.getActivationCode();
        context.setVariable("url",url);
        String content = templateEngine.process("/mail/activation",context);
        mailClient.sendMail(user.getEmail(),"激活账号",content);
        return map;
    }


    public int activation(int userId,String code){
        User user = userMapper.selectById(userId);
        if (user.getStatus() == CommunityConstant.ACTIVATION_REPEAT.getValue()){
            return CommunityConstant.ACTIVATION_REPEAT.getValue();
        }else if (user.getActivationCode().equals(code)){
            //更新用户信息
            userMapper.updateStatus(userId,1);
            //直接删除用户缓存
            clearCache(userId);
            return  CommunityConstant.ACTIVATION_SUCCESS.getValue();
        }else {
            return  CommunityConstant.ACTIVATION_FAILURE.getValue();
        }
    }
    public Map<String,Object> login(String username,String password,int expiredSeconds){
        Map<String,Object> map = new HashMap<>();

        //空值处理
        if (StringUtils.isBlank(username)) {
            map.put("usernameMsg", "账号不能为空！");
            return map;
        }
        if (StringUtils.isBlank(password)) {
            map.put("passwordMsg", "密码不能为空！");
            return map;
        }
        User user  = userMapper.selectByName(username);
        if (user == null){
            map.put("usernameMsg", "账号不存在！");
            return map;
        }
        if (user.getStatus() == 0){
            map.put("usernameMsg", "该账号未激活！");
            return map;
        }
        //验证密码
         password =  CommunityUtil.md5(password+user.getSalt());
        if (!user.getPassword().equals(password)){
            map.put("passwordMsg", "密码不正确！");
            return map;
        }
        //生成登录凭证
        LoginTicket loginTicket = new LoginTicket();
        loginTicket.setUserId(user.getId());
        loginTicket.setTicket(CommunityUtil.generateUUID());
        loginTicket.setStatus(0);
        loginTicket.setExpired(new Date(System.currentTimeMillis() + expiredSeconds *1000));
//        loginTicketMapper.insertLoginTicket(loginTicket);

        String redisKey = RedisKeyUtil.getTicketKey(loginTicket.getTicket());
        redisTemplate.opsForValue().set(redisKey,loginTicket);

        map.put("ticket",loginTicket.getTicket());

        return map;
    }

    public void logout(String ticket){
//        loginTicketMapper.updateStatus(ticket,1);
        String redisKey = RedisKeyUtil.getTicketKey(ticket);
        LoginTicket loginTicket = (LoginTicket)redisTemplate.opsForValue().get(redisKey);
        loginTicket.setStatus(1);
        redisTemplate.opsForValue().set(redisKey,loginTicket);
    }

    public LoginTicket findLoginTicket(String ticket){
//        return loginTicketMapper.selectByTicket(ticket);
        String ticketKey = RedisKeyUtil.getTicketKey(ticket);
        return (LoginTicket) redisTemplate.opsForValue().get(ticketKey);
    }
    public int updateHeader(int userId,String headerUrl){
       int rows =  userMapper.updateHeader(userId,headerUrl);
        clearCache(userId);
       return rows;

    }


    public User findUserByUsername(String username) {
        return userMapper.selectByName(username);
    }

    //1.优先从缓存中取值
    public User getCCache(int userId){
        String redisKey = RedisKeyUtil.getUserKey(userId);
        return (User) redisTemplate.opsForValue().get(redisKey);
    }
    //2.取不到时 ,初始化缓存数据
    public User initCache(int userId){
        User user = userMapper.selectById(userId);
        String redisKey = RedisKeyUtil.getUserKey(userId);
        redisTemplate.opsForValue().set(redisKey,user,3600, TimeUnit.SECONDS);
        return user;
    }
    //3.数据变更时清除缓存数据
    public void clearCache(int userId){
        String redisKey = RedisKeyUtil.getUserKey(userId);
        redisTemplate.delete(redisKey);
    }

    /**
     * 获取用户权限信息
     * @param userId
     * @return
     */
    public Collection<? extends GrantedAuthority> getAuthorities(int userId){
        User user = this.findUserById(userId);
        List<GrantedAuthority> list = new ArrayList<>();
        list.add(()->{
            switch (user.getType()){
                case 1:
                    return CommunityConstant.AUTHORITY_ADMIN.getType();
                case 2:
                    return CommunityConstant.AUTHORITY_MODERATOR.getType();
                default:
                    return CommunityConstant.AUTHORITY_USER.getType();
            }
        });
        return list;
    }

    public boolean getPassword(int userId,String password){
        User user = userMapper.selectById(userId);
        return  user.getPassword().equals(CommunityUtil.md5(password+user.getSalt()));
    }
    public void updatePassword(int userId,String password){
        User user = userMapper.selectById(userId);
        userMapper.updatePassword(userId,CommunityUtil.md5(password+user.getSalt()));
    }

}
